add animal sniffer check

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1443187 13f79535-47bb-0310-9956-ffa450edef68
restore 1.5 compat

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1443188 13f79535-47bb-0310-9956-ffa450edef68
upgrade to pmd 5.0.2

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1443189 13f79535-47bb-0310-9956-ffa450edef68